SWECO25 is a Swiss-wide raster database at 25-meter resolution, containing 5,265 layers across 10 environmental categories: geologic, topographic, bioclimatic, hydrologic, edaphic, land use and cover, population, transportation, vegetation, and remote sensing. The database was standardized to a common grid with the same resolution, extent, and geographic coordinate system. It includes both standardized source data and newly calculated layers, such as those obtained by computing focal or distance statistics. SWECO25 was validated through a data integrity check, and the standardization procedure was found to have a negligible effect on the output values. The database is available on Zenodo and is intended to be updated and extended regularly. SWECO25 was developed through four main steps: dataset identification, selection, processing, and public upload. Datasets were identified by screening academic geodata servers and consulting with a panel of scientists. Datasets were selected based on their relevance for ecological research, spatial coverage, and input resolution. Layers were processed through an eight-step standardization procedure, including rasterization, reprojection, resampling, and transformation of discrete data to continuous values. The final layers were saved as GeoTIFF files. SWECO25 includes 16 datasets, with a total of 5,265 layers, covering a wide range of environmental themes. The database is organized into ten main categories, with the most layers being land use and cover. The database is publicly available on Zenodo and includes detailed metadata and technical validation information. The R-code and ArcGIS toolboxes for reproducing the standardization procedure are also available on the SWECO25 GitHub repository. The database is intended to support ecological research, biodiversity conservation, and other applications of national interest in Switzerland.SWECO25 is a Swiss-wide raster database at 25-meter resolution, containing 5,265 layers across 10 environmental categories: geologic, topographic, bioclimatic, hydrologic, edaphic, land use and cover, population, transportation, vegetation, and remote sensing. The database was standardized to a common grid with the same resolution, extent, and geographic coordinate system. It includes both standardized source data and newly calculated layers, such as those obtained by computing focal or distance statistics. SWECO25 was validated through a data integrity check, and the standardization procedure was found to have a negligible effect on the output values. The database is available on Zenodo and is intended to be updated and extended regularly. SWECO25 was developed through four main steps: dataset identification, selection, processing, and public upload. Datasets were identified by screening academic geodata servers and consulting with a panel of scientists. Datasets were selected based on their relevance for ecological research, spatial coverage, and input resolution. Layers were processed through an eight-step standardization procedure, including rasterization, reprojection, resampling, and transformation of discrete data to continuous values. The final layers were saved as GeoTIFF files. SWECO25 includes 16 datasets, with a total of 5,265 layers, covering a wide range of environmental themes. The database is organized into ten main categories, with the most layers being land use and cover. The database is publicly available on Zenodo and includes detailed metadata and technical validation information. The R-code and ArcGIS toolboxes for reproducing the standardization procedure are also available on the SWECO25 GitHub repository. The database is intended to support ecological research, biodiversity conservation, and other applications of national interest in Switzerland.